bhyve.8: Improve emulation description of the -s flag
- Set width of the list to the longest key word for readability.
- Separate descriptions of amd_hostbridge and hostbridge emulations.
Also, wordsmith their descriptions for consistency with other entries.
- Use Cm instead of Li for command modifiers.
- Do not stylize AMD with Li, there's no need to do it.
- Mention COM3 and COM4 in the definition of lpc.
- Fix a typo in the definition of ahci-hd ("hard drive" instead of
"hard-drive").
Also, remove the macros of the nested list which contained slot,
emulation and conf. This decreases the indention of the -s description.
It was necessary to clean up the slot description.
bhyve.8: Improve the description and synopsis of -l
- Describe "-l help" separately for readability.
- List all the supported comX devices explicitly
- Use Cm instead of Ar for command modifiers (i.e., literal values a
user can specify as an argument to the command).
- Explain where to get more information about the possible values of the
conf argument.
In particular:
- Sort short options to align with style(9)
- Add two missing flags: -G and -r
- Drop unnecessary angle brackets for consistency
- Rename the "vm" argument to vmname for consistency with the manual
page
Warner Losh [Sun, 18 Apr 2021 17:10:59 +0000 (11:10 -0600)]
Minor style cleanup
We prefer 'while (0)' to 'while(0)' according to grep and stlye(9)'s
space after keyword rule. Remove a few stragglers of the latter.
Many of these usages were inconsistent within the file.
mips/octeon SDK: Fix __cvmx_cmd_queue_lock asm for clang 11
The 'ticket' and 'my_ticket' arguments are both read and written within
the same asm block. Clang is stricter with the constraints than gcc4
was, so accepts the '=r' at face value and will happily overwrite
registers that "should" be preserved.
Mark these operands to not clobber other operands, so they get their own
registers.
This fixes a panic on bringing up the octe interfaces.
jail.conf(5): emphasize where to find jail parameters
Some people expect jail.conf(5) to have a list of jail parameters.
jail(8) contains a comprehensive list of all parameters to be used during jail
invocation or in jail.conf.
Highlighting where to look for jail parameters seems a reasonable solution.
Fib algo: extend KPI by allowing algo to set datapath pointers.
Some algorithms may require updating datapath and control plane
algo pointers after the (batched) updates.
Export fib_set_datapath_ptr() to allow setting the new datapath
function or data pointer from the algo.
Add fib_set_algo_ptr() to allow updating algo control plane
pointer from the algo.
Add fib_epoch_call() epoch(9) wrapper to simplify freeing old
datapath state.
Michael Tuexen [Sun, 18 Apr 2021 14:08:08 +0000 (16:08 +0200)]
tcp: add support for TCP over UDP
Adding support for TCP over UDP allows communication with
TCP stacks which can be implemented in userspace without
requiring special priviledges or specific support by the OS.
This is joint work with rrs.
We must make sure that incoming packets will never overflow the netmap
buffers, even when the user is using the offset feature. In the typical
scenario, the netmap buffer is 2KiB and, with an MTU of 1500, there are
~500 bytes available for user offsets.
Unfortunately, some NICs accept incoming packets even when they are
larger then the MTU. This means that the only way to stop DMA from
overflowing the netmap buffers, when offsets are allowed, is to choose
a hardware buffer length which is smaller than the netmap buffer
length. For most NICs and for 2KiB netmap buffers, this means 1024
bytes, which is unconveniently small.
The current code will select the small hardware buf size even when
offsets are not in use. The main purpose of this change is to
fix this bug by returning to the normal behavior for the no-offsets
case.
At the same time, the patch pushes the handling of the offset case
to the lower level driver code, so that it can be made NIC-specific
(in future patches).
"zgrep --version" is expected to print the version information in the
same way as "zgrep -V". However, the case handling the --version flag
is never reached, so "zgrep --version" prints:
zgrep: missing pattern
instead of:
grep (BSD grep, GNU compatible) 2.6.0-FreeBSD
The proper approach would have been to prepare the wpa build to
build the various subdirectories into .a libraries. SRCS makes no
distinction between files of the same name. The MFV accounted for this
but the revert failed to remove the additional files, including the
conflicting utils/config.c.
It seems to be a nice idea to show how fork() is usually used in
practice. This may act as a guide to developers who want to quickly
recall how to use the fork() function.
It seems that the number of lines is no longer an optional parameter to
the -C flag. Document it accordingly both in the manual page and the
usage message.
Warner Losh [Sat, 17 Apr 2021 19:53:01 +0000 (13:53 -0600)]
newbus: Minor update fix.
driver_t was supposed to just be a quick hack for 4.x
compatibility. However, it's been documented now as the preferred API
rather than the replacement kobj_class_t. Drop the note about 4.x since
it's clear we're a bit late to retiring its use through the tree with
almost 1500 references to driver_t.
Maintain code similarity between RACK and base stack
for ECN. This may not strictly be necessary, depending
when a state transition to FIN_WAIT_1 is done in RACK
after a shutdown() or close() syscall.
MFC after: 3 days
Reviewed By: tuexen, #transport
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D29658
b51f459a2098622c31ed54f5c1bf0e03efce403b resulted in a mismerge
due to having to do a remerge because my tree was over a week out of
date. Changes that were made to fix the build were lost in the remerge
resulting in build errors that were fixed a week ago.
Alexander Motin [Sat, 17 Apr 2021 14:41:35 +0000 (10:41 -0400)]
mpt(4): Remove incorrect S/G segments limits.
First, two of those four checks are unreachable.
Second, I don't believe there should be ">=" instead of ">".
Third, bus_dma(9) already returns the same EFBIG if ">".
This fixes false I/O errors in worst S/G cases with maxphys >= 2MB.
opal_console: fix serial console output corruption on powerpc64
Adds OPAL_CONSOLE_WRITE error handling and implements a call to
OPAL_CONSOLE_WRITE_BUFFER_SPACE to verify if there's enough space
before writing to console.
This fixes serial port output getting corrupted on fast writes, like
on "dmesg" output.
Tested on Raptor Blackbird running powerpc64 BE kernel
Alexander Motin [Fri, 16 Apr 2021 19:39:01 +0000 (15:39 -0400)]
pms(4): Limit maximum I/O size to 256KB instead of 1MB.
There is a weird limit of AGTIAPI_MAX_DMA_SEGS (128) S/G segments per
I/O since the initial driver import. I don't know why it was added,
can only guess some hardware limitation, but in worst case it means
maximum I/O size of 508KB. Respect it to be safe, rounding to 256KB.
Without it, Qt5 apps from Focal fail to start, being unable to load
their plugins. It's also necessary for glibc 2.33, as found in recent
Arch snapshots.
Ryan Moeller [Fri, 16 Apr 2021 02:32:25 +0000 (22:32 -0400)]
ifconfig: Reuse media state in ifmedia_getstate
This restores behavior lost in code cleanup, fixing a regression after 2803fa471e77dc8f227fe00bbf075de7feb10022 where changing media options
only applies some of the changes, not all.
A security feature from c06f087ccb12 appeared to be a huge bottleneck
under SYN flood. To mitigate that add a sysctl that would make
syncache(4) globally visible, ignoring UID/GID, jail(2) and mac(4)
checks. When turned on, we won't need to call crhold() on the listening
socket credential for every incoming SYN packet.
It turns out that the Linux client intentionally does an NFSv4.1
RPC with only a Sequence operation in it and with "seqid + 1"
for the slot. This is used to re-synchronize the slot's seqid
and the client expects the NFS4ERR_SEQ_MISORDERED error reply.
As such, revert the patch, so that the server remains RFC5661
compliant.
Initial fib algo implementation was build on a very simple set of
principles w.r.t updates:
1) algorithm is ether able to apply the change synchronously (DIR24-8)
or requires full rebuild (bsearch, lradix).
2) framework falls back to rebuild on every error (memory allocation,
nhg limit, other internal algo errors, etc).
This changes brings the new "intermediate" concept - batched updates.
Algotirhm can indicate that the particular update has to be handled in
batched fashion (FLM_BATCH).
The framework will write this update and other updates to the temporary
buffer instead of pushing them to the algo callback.
Depending on the update rate, the framework will batch 50..1024 ms of updates
and submit them to a different algo callback.
This functionality is handy for the slow-to-rebuild algorithms like DXR.
Alex Richardson [Thu, 15 Apr 2021 15:27:52 +0000 (16:27 +0100)]
lib/msun: Exclude ignored-pragmas from -Werror
This avoids build failures due to the clang 12 warning:
'#pragma FENV_ACCESS' is not supported on this target - ignored
Clang 12 currently emits this warning for all non-x86 architectures.
While this can result in incorrect code generation (e.g. on AArch64 some
exceptions are not raised as expected), this is a pre-existing issue and
we should not fail the build due to this warning.
ng_ubt: Do not clear stall before receiving of HCI command response.
Unconditional execution of "clear feature" request at SETUP stage was
workaround for probe failures on ng_ubt.ko re-kldloading which is
unnecessary now.
The trunc_dependencies() issue was reported by Alexander Lochmann
<alexander.lochmann@tu-dortmund.de>, who found the problem by performing
lock analysis using LockDoc, see https://doi.org/10.1145/3302424.3303948.
Tested by: pho
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
When O_NOFOLLOW is specified, namei() returns the symlink itself. In
this case, open(O_PATH) should be allowed, to denote the location of symlink
itself.
Prevent O_EXEC in this case, execve(2) code is not ready to try to execute
symlinks.
bhyve: implement rdmsr for MSR_IA32_FEATURE_CONTROL
Without the -w option, Windows guests crash on boot. This is caused by a rdmsr
of MSR_IA32_FEATURE_CONTROL. Windows checks this MSR to determine enabled VMX
features. This MSR isn't emulated in bhyve, so a #GP exception is injected
which causes Windows to crash.
Fix by returning a rdmsr of MSR_IA32_FEATURE_CONTROL with Lock Bit set and
VMX disabled to informWindows that VMX isn't available.
Ensure that the mount command shows "with quotas" when quotas are enabled.
When quotas are enabled with the quotaon(8) command, it sets the
MNT_QUOTA flag in the mount structure mnt_flag field. The mount
structure holds a cached copy of the filesystem statfs structure
in mnt_stat that includes a copy of the mnt_flag field in
mnt_stat.f_flags. The mnt_stat structure may not be updated for
hours. Since the mount command requests mount details using the
MNT_NOWAIT option, it gets the mount's mnt_stat statfs structure
whose f_flags field does not yet show the MNT_QUOTA flag being set
in mnt_flag.
The fix is to have quotaon(8) set the MNT_QUOTA flag in both mnt_flag
and in mnt_stat.f_flags so that it will be immediately visible to
callers of statfs(2).
Mark Johnston [Wed, 14 Apr 2021 16:57:24 +0000 (12:57 -0400)]
uma: Introduce per-domain reclamation functions
Make it possible to reclaim items from a specific NUMA domain.
- Add uma_zone_reclaim_domain() and uma_reclaim_domain().
- Permit parallel reclamations. Use a counter instead of a flag to
synchronize with zone_dtor().
- Use the zone lock to protect cache_shrink() now that parallel reclaims
can happen.
- Add a sysctl that can be used to trigger reclamation from a specific
domain.
Currently the new KPIs are unused, so there should be no functional
change.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29685
Mark Johnston [Wed, 14 Apr 2021 16:56:39 +0000 (12:56 -0400)]
domainset: Define additional global policies
Add global definitions for first-touch and interleave policies. The
former may be useful for UMA, which implements a similar policy without
using domainset iterators.
No functional change intended.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D29104
Notable upstream pull request merges:
#11742 When specifying raidz vdev name, parity count should match
#11744 Use a helper function to clarify gang block size
#11771 Support running FreeBSD buildworld on Arm-based macOS hosts
This is the last update that will be MFCed into stable/13.
From now on, the tracking of OpenZFS branches will be different:
- main continues tracking openzfs/zfs/master
- stable/13 is going to track openzfs/zfs/zfs-2.1-release
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